Rotary pump.



A. T. KEENE.

ROTARY PUMP. I APPLICATION FILED APR-8.1914.

Patented Oct. 26, 1915.

3 SHEETS-SHEET I.

A. T. KEENE. ROTARY PUMP.

TION F Patented. Oct. 26, 1915.

3 EEEEEEEEEEEE 2.

A. T. KEENE.

' ROTARY PUMP.

APPLICATION FILED APR-8. 1914.

Patented Oct. 26, 1915.

3 SHEETS-SHEET 3- ARQHIBAIJD '1. KEENE, F CHICAGU, ILLINOIS, AS SIGNOR, BY DIBECT AND MESNE ASSIGNMENTS, T0 KEENE HRAULIC TRANSMISSION COMPANY, A CORPURA- RDTARY PUMP.

memes.

Specification of Letters Patent.

Application filed April 8, i914. Serial Ito-830,392.

To all whom it may concern v Be it known that f, ARGHIBALD T. KEENE, a citizen of the United States of America, and a resident of Chicago, in the county of Cook, State of Illinois, have invented certain new and useful Improvements in Riotary Pumps, of which the following is a specification.

This invention relates to that type of rotary pumps, which are formed by a series of pump units capable of control and whereby more or less of said pump units can be actively employed to vary the capacity of the pump as a whole. And the present improvement has for its object to provide a simple and efficient structural formation and combination of parts wherebythe partitions between the rotary abutment members of the above mentioned series of pump units are maintained in proper relation to the companion partitions between the rotary fective, in accordance with requirements as to change of speed, and the like, in power transmlssion systems for motor vehicles such as forms the subject matter of my application for patent, Serial No. 828,33l,filed March 30th, 1914:. u

Another object is to provide a simple and efficient reversing valve mechanism in connection .with the inlet and outlet passages of the pump for reversing the direction of the fluid from the outlet passages of ,the

pump through the motors of a hydraulic transmissionsystem such as forms the subx ject matter of my application for patent Serial No. 828,331, filed March 30th, 1914, all as will hereinafter more fully appear.

In the accompanying drawings: Figure 1-, is a longitudinal section partly on line 00-00, Figs. 5 and 6, illustrating the general arrangement of parts of a reversible rotary pump embodying the present invention.

Fig. 2, is an enlarged detail transverse se'ctlon on line mm, Fig.4). Fig. 3, is an enlarged detail longitudinal section on line m .m Figs. 2 and 5. Fig. 4;, is a detail perspective View of one ofthe containing shells of the rotary abutments of the pump. Fig.

5, is atransverse sectional elevation, on line n -w Fig. 1. Fig. 6, is a similar view on line m*-w*, Fig. 1. Fig. 7, is a perspective view of the reversingvalve member, detached.

Similar reference numerals indicate like parts in the several views.

Referring to the drawings, 1 represents the outer shell or casing of the pump provided with end closure heads 2 and 3, of the detail construction hereinafter described and secured to the shell or casing 1, by bolts or other usual fastening means.

4: is the main. circular chamber of the pump formed centrally in the pump shell or' casing 1, andcin concentric relation to the bearing recess and orifice in the pump casing'heads 2, and 3,.aforesaid, and'in which recess and orifice, the driving shaft of the pump mechanism is journaled.

5 are one .or more marginal side chambers or pockets, preferably two in number and disposed in diametric relation to the. pump shell or casing 1, and opening into the main central chamber 4, as shown in Fig. 2.

6 and? are pairs of orifices or passages formed in the pump shell or casing 1, in

I Patented Get. 2%, ll fld.

adjacent relation to and at opposite sides of the aforesaid marginal sub-chambers or pockets 5. Each pair of orifices 6, 7, constitute a fluid discharge passage and a companion fluid supply passage for the pump mechanism, and to such end communicate by ports 8 and 9 with the main central chamber 4 of the pump. In the present improvement one orifice of each pair of said orifices 6, 7, and preferably the fluid pressure discharge orifices 6, will constitute piston chambers for the adjustable piston valves hereinafter described. I

10 are connecting passages formed in the head 2 of the pump shell or casing l, to con stitute fluid connections between the ends of.

each pair 6 and 7 of the aforesaid orifices next adjacent to said head 2, and adapted to form short circuits between the end of the outlet and supply ports of the pump units which are rendered ineffective by the adjustable piston valves above referred to.

11, are the series of rotary pistons or rotors of the pump fitting the main chamber of the pump casing and maintained in separated relation therein by interposed partitions or diaphragms 12. The periphery of each of said pistons 11, is formed with gear teeth 13 intermediate of a plurality of largerformed therefor by the hereinafter described series of containing cells or cups, arranged in the side chambers or pockets 5 of the pump casing 1. .The periphery of each of said abutment members 16, is formed with gear-teeth 17 intermediate of a pair of peripheral recesses 18, which constitute receiving pockets for the larger teeth or piston ribs 14 of the rotary piston 11, in the actual operation of the pump.

In' the described construction the gear teeth 17 of the rotary abutments 16 are adapted to mesh with the gear teeth 13 of the rotary piston 11, to insure positive proportional rotation on the respective parts. And with a view to insure a continued positive operative engagement, between said abutment and pistons, the gear teeth 13, 17, piston ribs 14:, and recesses 18 of each pump unit, will have a staggered or alternated relation to the similar gear' teeth, piston ribs and recesses of the next adjacent pump unit, as illustrated in- Figs. 2 and 3, and asheretofore :proposed in the present type of pumps. 7

A material part of the present invention consists in the provision in themarginal subchambers 5, heretofore described, of a series of-mdlvidual containing shells or cups for A the individual rotary abutment members 16.

her 5, so as to bear against and support eachv other, and to such end each containing shell, will comprise a detail construction as fol-o In the construction shown a series of said containing shells are fitted in each sub-chamlows :19 is an annular rimof a depth and internal diameter corresponding with the thickness and external diameter of a rotary abutment member 16 and cut away atone side to permit the meshingof the gear teeth 17 and recesses-l8, of said member 16 with the gear, teeth 13, and piston ribs 14 of the companion rotary piston member 11, of a I pump unit. 20 is an end head preferably formed integral with the annular rim 19 aforesaid, and having a central orifice 2-1 for the reception of the carrying shaft 22, of the rotary abutment member 16 as shown.

With the. described construction the series of rotary abutment members 16 are protected against endwise stress, and in proper position corresponding with the before described partitions or diaphragms 12, between the rotary piston members 11, in a simple, convenient and economical manner. 23 and 24 are a pair of passages formed in the pump head 3 by a U shaped partition 3. Said passages at one end are in communication, by ports 23 and 24: with the hereinafter described reversing valve chamber, and at the other end with the respective motive fluid inlet and outlet necks 23" and 24" of N the pump head 3, aforesaid.

25 is a wall separating the main chamber 4: of the pump, and the'working chamber of the hereinafter described reversing valve member. Said valve chamber has communication withthe series of passages 6 and 7 heretofore described.

* The oscillatory reversing valve member above referred to is disposed in the above mentioned valve chamber, and has a detail construction as follows: 26 is a transversely disposed base plate or web, having bearing upon the intermediate head 25, aforesaid, and provided with counterpart sidewalls or flanges 26 26 which in turn have bearing against the adjacent face of the pump head 3. The side walls or flanges 26 26 are preferably disposed in the flaring manner shown in Figs. 5 and 7, and in connection with the aforesaid adjacent face of the pump head 3, provide a transverse passage, the outer ends of which are adapted, by an oscillatory adjustment of the valve member, to register with one or the other of the pairs of pump passages 6, 7, while the middle portion of said transverse passage is at all times in communication with the passage 23 and neck 23 of the pump head 3. With the registry of the aforesaid transverse passage with one pair of the pump passages aforesaid, the other pair of said pump passages will be in communication with the passage 24; and neck 221:" of the pump head 3, and vice versa.

' 1 27 is a valve stem journaled in the end head 3, and in the intermediate head 25, aforesaid, and carrying the aforesaid oscillatory valve 26, with its outer end provided with anoperatingarm 27, for operative connection with means extending within reach of the operator for a manual operation of said valve.

28 and 29 are cylindrical casings preferably formed integral with the end heads 3 of the pump casing, and closed at their scribed. The bores of said casings 28,

29, constitute alined passages for the re-' ception and movement of portions of the pair of adjustable piston valves now to be described. a 1

32 and 33 are the valve rods of the piston valves above referred to, and disposed centrally in the passages 6, which constitute the fluid pressure discharge passages of the pump. Said valve rods 32, 33, pass through the stufling boxes 30, 31,, and have their outer ends connected together by a cross-head 34:, so that a simultaneous reciprocation of the valve rods may be obtained, through suit able means extending within the reach of the operator, for the manual adjustment of the piston valves carried by the valve rods 30, 31, aforesaid.

- 35 is a piston ,or valve head secured at the inner end of each valve rod 32, 33, and moving in a fluid tight manner in the bore of a passage 6, aforesaid, and adapted in its adjustment in a direction away from the end head 2 of the pump casing, to successively register the series of communicating, ports ,9, between said passage 6, and the piston chambers 4 of the pump units, with the portion of a passage 6 next; adjacent to the head 2 of the pump casing, and with a lateral connecting passage 10, above described, to

render such pump units dormant and lea'ving the remainder of the pump units active and capable of supplying motive fluid of a correspondingly decreased volume and increased pressure to the motors of the system.

36 is a secondary piston head secured to each of the valve rods 32, 33, at a distance to a stufing box 30, 31, of said casing withremoved from the aforesaid valve head 35 and moving in a fluid tight manner in the bore or chamber of a cylindrical casing 28, 29, on the end head 3 of 'the pump casing. The space between the valve heads 35 and 36 is preferably greater than the length of the'main piston chamber 4: of the pump, in order that said space may communicate in common with the discharge of all the pump units or with more or less of the same, and the arrangement is such that the pressure of the motive fluid discharge from the pump "units against .said piston heads is evenly balanced, and the movement or adjustment of the valve mechanism is rendered easy and with the expenditure of but little force.

37'is a passage preferably formed ineach valve rod'32, 33, and connecting the portion of the bore of a casing 28, 29, next adjacent the portion of a passage 6, next adjacent to a the head 2 of the pump casing. -Such arrangement is adapted to permit a flux and reflux flow of fluid into the above mentloned portion of the'lbore of a casing 28, 29, to and from the above described portion of the I Kit passage 6, leaving the movement of the con trolling valve unimpeded by any accumulation of fluid or by an absence of fluid, in the aforesaid portion of the piston. chamber next adjacent to a stuffing box 30, 31.

' Having thus fully described my said invention what I claim as new and desire to secure by Letters Patent, is

l A rotary pump, comprising an outer caslng formed with a main piston chamber and with longitudinal outlet and return pasof valve heads connected together in spaced relation and having sliding movement in the aforesaid outlet passage, the space between said valve heads exceeding in length that of the main piston chamber, and means for imparting sliding movement to said valve heads, substantially as set forth.

2. A rotary pump, comprising an outer casing formed with a main piston chamber and with longitudinal outlet and return passages united at one end by a connecting passage, a series of partitions in the main piston chamber dividing the same into subchambers having individual port connections with the aforesaid passages, a series of rotary pistons in said sub-chambers, a pair of valve heads connected together in spaced relation and having sliding movement in the aforesaid outlet passage, the space between said valve heads exceeding inlength that of the main piston chamber, the valve heads having an associated passage extending from in front of one valve head to the rear of the said sub-chambers, valve heads sliding in the aforesaid outlet passages to control the port connections thereof, and means for 1mparting simultaneous movement to said valve heads, substantially as set forth.

a. A rotary pump, comprising an outer casing formed with a main piston chamber, and with a plurality of pairs of longitudinal outlet and return passages united at one end and in pairs by connecting passages, a series of partitions in the main piston chamber dividing the same into sub-chambers having individual port connections with the aforesaid passages, a series of rotary pistons in said sub-chambers, -valve heads sliding in the aforesaid outlet passages to control the port connections thereof, and each. valve consisting-of a port controlling head and a balancing head. arranged in separated relation, and means for lmparting simultaneous movement to said valve heads, substantially as Set forth.

5. A rotary pump, comprising an outer casing formed with central and side chambers and with longitudinal outlet and return pas-p sages united at one end by a connecting passage, a series of partitions dividing the central chamber aforesaid into a series of subchambers having individual port connections with the aforesaidpassages, a series of rotary pistons in said sub-chambers, a series of rotary abutments in the aforesaid side chambers, a pair of valve heads connected together in spaced relation and having sliding movement in the aforesaid outlet passage, the space between said valve heads exceeding in length that of'the main piston chamber, and means for imparting sliding movement to said valve heads, substantially as set forth.

.6. A rotary pump, comprising an outer casing formed-with central and side chambers and with a plurality of longitudinal outlet and return passages united together K in pairs at one endby connecting passages,

a series of partitions dividing the central outlet and return passages united together in pairs at one end by connecting passages,

a series of partitions dividing the central chamber aforesaid into a series .of sub-chambers having individual. port connections with the aforesaid passages, a series-of ro-. tary pistons said sub-chambers, a series. of rotary abutments in the aforesaid side chambers, valve heads sliding in the aforesaid outlet passages to control the port connections thereof, and each valve consisting of a port controlling head and a balancing head arranged 'n separated relation, and means for imparting simultaneous movement to said valve heads, substantially as set forth.

8. A rotary, pump, comprising an outer casing formed with central and side chambers and with longitudinal outlet and return passages, a series of partitions dividing the central chamber aforesaid into a series of sub-chambers having individual port connections with the aforesaid passages, a series of rotary pistons in said sub-chambers, a series of rotary abutments in the aforesaid side chambers, and a series of shells fitting .said side chambers in end to end relation and containing the rotary abutments, each nections with the aforesaid passages, a series of rotary pistons in said sub-chambers, a

series of rotary abutments in the aforesaid side chambers, and a series of shells fitting said side chambers in end to end relation and containing the rotary abutments, each shell comprising an annular portion cut away at one side, and an end web formed integrally with said annular portion and centrally orificed for the passage of the carrying shaft of a rotary abutment, substantially as set forth.

' 10. A rotary pump, comprising an outer casing formed with central and side chambers and with longitudinal outlet and return passages united at one end by a connecting passage,.a series of partitions dividing the central chamber aforesaid into a series of sub-chambers having individual port connections with the aforesaid passages, a series of rotary pistons in said sub-chambers, a

series of rotary abutments associated with said side chambers, a series of shells fitting said side chambers in end to end relation said valve head,.subs'tantially as set forth.

'11. A pump; comprising a plurality of rotary pistons, a plurality of rotary abutments associated therewith, a plurality of partitions locatedbetween said rotary abutments, and means to prevent endwise stress on the rotary abutments, the same comprising a series of shells having end to end relation and inclosing said 1 abutments, each shell comprising an annularportion cut away, at one side and an end web centrally orificed for the carrying shaft of a rotary abutment.

12. In combination a pump having a pair of outlet passages and a pair of inlet passages, a valve chamber having communication with the aforesaid pairs of outlet and inlet passages and provided with a pair of outlet-inlet passages, one of which is dis posed laterally, and an oscillatory reversing valve arranged in said chamber and formed with a transverse channel adapted to alternately register With the aforesaid pairs of outlet and inlet passages of the pump and having continuous communication with the 10 laterally disposed inlet-outlet passages of the valve chamber, substantially as set forth. Signed at Chicago, Illinois, this 27th day of March, 1914.

ARCHIBALD T. KEENE. Witnesses:

THoMAs Rnonus, ROBERT BURNS. 

